Dispensing closure

ABSTRACT

A dispensing closure for a flowable product is provided. The closure has: a dispensing orifice; a pre-dispensing chamber with an inlet; and a valve member. The valve member is movable between a first position in which inlet is blocked and a second position in which inlet is unblocked and is in fluid communication with the orifice.

The present invention relates generally to a dispensing closure and particularly to a closure for a flowable product.

The present invention seeks to provide improvements in or relating to dispensing closures for flowable products such as condiments including, for example, ketchups and the like.

According to a first aspect of the present invention there is provided a dispensing closure for a flowable product, the closure having: a dispensing orifice; a pre-dispensing chamber with an inlet; and a valve member movable between a first position in which inlet is blocked and a second position in which the inlet is unblocked and is in fluid communication with the orifice.

In this way the closure can be configured to provide a number of advantages, including:

1) An anti-spurt function. This is because the product is not dispensed directly from the orifice but must, due to the presence of the valve, pass through the pre-dispensing chamber. This can be particularly useful for products which are dosed with gas e.g. Nitrogen where the initial pressure can cause spurting.

2) A serum trap. Certain flowable products, such as ketchups and mustards, tend to separate over time into a lighter and a heavier fraction. The lighter fraction is less viscous than the heavier fraction and tends to separate from, and collect on top of, the heavier fraction. The lighter fraction, also sometimes referred to as “serum”, causes problems for conventional dispensing closures. This is because the lighter fraction will tend to reach a dispensing orifice before the heavier fraction; and in general consumers find dispensing of the lighter fraction undesirable. The present invention can be configured to ensure that the path from the pre-chamber inlet and the dispensing orifice causes at least the majority of the fluid reaching the terminal orifice to be free of serum.

3) Improved “suck back”. Because the air must travel through a long path from the dispensing orifice into the container this causes improved negative pressure which helps to suck any undispensed product in the closure back into the container.

The valve member may be translatable within the chamber between the first and second positions. In other words the complete valve member itself moves as opposed to, for example, a flap valve which hinges open and closed. In some embodiments the valve may move generally axially within the chamber. For this purpose the valve member may be provided with guide means for constraining the movement to be substantially axial.

The valve member may be movable in response to product flow. For example, the product itself may move the valve member away from the inlet so that it can reach the orifice.

The chamber may be generally bucket-like. For example a generally cylindrical container open at one end and closed at the other except for the inlet.

The valve member may include an inlet. The path through the pre-chamber may therefore be through the valve itself.

The valve member may include a spout, which may be connected to the dispensing orifice. In some embodiments the spout may include in inlet and the inlet may be provided in the region of the base of the spout.

The closure may include a base and a lid. For example the base is connectable to a container and the lid is used to close the base to protect the contents of the container.

The lid and base may be joined by a hinge. For example the closure may be formed as a flip-top dispensing closure.

The lid may be moveable between an open position and a closed position; and when the lid is in the closed position the valve member may be caused to be in the first position.

The lid may include a spigot and the spigot may push the valve to the first position. For example when the lid is closed onto the base after dispensing the spigot may enter the dispensing orifice and engage part of the valve (e.g. a spout).

According to an alternative aspect there is provided an anti-spurt dispensing closure comprising a closure as described herein.

According to an alternative aspect there is provided a condiment dispensing closure comprising a closure as described herein.

According to an alternative aspect there is provided a flip-top dispensing closure comprising a closure as described herein.

According to an alternative aspect there is provided a closure as described herein in combination with a container.

The present invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is an exploded perspective sectional view illustrating the components of a dispensing closure formed according to an embodiment of the present invention;

FIG. 2 is a perspective view of a base and lid arrangement forming part of the closure of FIG. 1;

FIG. 3 is an underplan perspective view of the base/lid of FIG. 2;

FIG. 4 is an underplan perspective view of a pre-dispensing chamber forming part of the closure of FIG. 1;

FIG. 5 is a plan perspective view of the chamber of FIG. 4;

FIG. 6 is an underplan perspective view of a valve member forming part of the closure of FIG. 1;

FIG. 7 is a plan perspective view of the valve of FIG. 7;

FIG. 8 is a section of the closure of FIG. 1 when assembled and shown in a closed position with the valve member in a first position; and

FIG. 9 is a section of the base of FIG. 8 shown with the valve member in a second position.

Referring first to FIG. 1 there is shown the components of a dispensing closure generally indicated 10. The closure comprises: a lid 15; a base 20; a valve member 25; and a pre-dispensing chamber 30.

Referring also to FIGS. 2 and 3, the base 20 and lid 15, which together make up the main body of the closure, are shown in more detail.

The base 20 comprises a generally cylindrical side wall 35 open at one end and closed at the other by a top plate 40 which includes a centrally located turret 45 having an end plate 50 which includes an eccentrically located dispensing orifice/opening 55 with an internally extending orifice wall 56.

The interior of the side wall 46 of the turret 45 has a circumferential snap bead 47. Towards the open end of the interior of the side wall 35 is a further circumferential snap bead 36.

Extending from the base of the turret wall 46 is a sealing projection 48. Depending from the underside of the top plate 40 is a circumferential sealing rib 49.

The upper surface of the plate 40 carries an arcuate tamper evident strip 60 which is connected to the top plate 40 by frangible bridges 61. The strip 60 has two spaced recesses 62.

The lid 15 comprises a generally cylindrical side wall 16 closed at one end by a generally disc-shape top plate 17. The side wall 16 includes an inward step 18 which defines an arcuate rebate 19.

The rebate 19 carries a pair of lugs 66. The rebate 19 is shaped to receive the tamper evident strip 60 when the lid is positioned on to the base. In the initially closed position the lugs 66 engage into the slots 62 under the strip. This means that the lid 15 cannot be opened without first removing the strip 60 by tearing it off the plate 40 and breaking the bridges 61.

The top plate 17 carries a depending spigot 65 positioned to engage the orifice 55 of the base as described in more detail below.

In some embodiments (not shown) the lid 15 and base 20 are joined together by a hinge to form a flip-top dispensing closure.

Referring now to FIGS. 4 and 5 the pre-dispensing chamber 30 is shown in more detail.

The chamber 30 is generally bucket-like and includes a generally cylindrical side wall 31 with a base plate 32.

The plate 32 has an inlet 33 defined by an internally extending spout 34.

The side wall 31 includes a rebate 70 which defines an internal arcuate shelf 71 on the opposite side to the spout 34.

The free end of the side wall 31 has an outwardly flared lip defining a snap bead 72 and an inwardly extending stop bead 73.

Referring now to FIGS. 6 and 7 the valve member 25 is shown in more detail.

The valve 25 comprises a disc-like main platform. One side of the platform 26 includes a circular inlet 27 and the other side of the platform includes an upstanding spout 28. It will be noted that the spout 28 includes a lateral inlet 29; in other words the spout inlet 29 is not provided by the platform 26 but rather by a cut-out in the side wall of the spout itself.

Depending from the periphery of the platform 26 is an arcuate first tab 75 a generally opposite the tab 75 a are two smaller, spaced tabs 75 b, 75 c. Projecting from the periphery of the platform 26 are a main tab 76 a and two further tabs 76 b, 76 c. Viewed in plan, the tabs 75 a, 76 a are diametrically opposed and so are respective smaller tabs 76 b, 75 b and 76 c, 75 c.

Referring now also to FIG. 8 the closure 10 is shown assembled.

The valve 25 is assembled into the chamber 30. The tabs 75 b, 75 c fit either side of the shelf 71 and the tab 75 a fits in between the side wall 31 and the spout 34. As shown in FIG. 8 in this first position of the valve 25 within the chamber 30 the platform 26 blocks the mouth of the spout 34.

With the valve 25 in place, the chamber 30 is fitted into the interior of the closure base 20. The open end of the chamber 30 is pushed up into the turret 45 so that the bead 72 snap engages over the bead 47 to lock the chamber in position.

The platform spout 28 extends in this position partly into the dispensing orifice side wall.

It will be noted that in the position shown in FIG. 8 product cannot flow through the spout 34 into the chamber 30. It will also be noted that the lid spigot 65 is engaged through the orifice 55 and projects down into the orifice side wall so that it engages the platform spout 28. The spigot 65 holds the valve 25 in the position shown in FIG. 8.

When the lid 15 is removed the spigot 65 no longer prevents the valve 25 from moving. Product can now enter the dispensing chamber 30 by forcing the valve 25 to move. In other words the product flow itself pushes the valve 25 upwards (as shown in the drawing) and away from the inlet 33. In products which have been pre-dosed with gas, the first time the pack is opened the gas will also contribute to pushing the valve away from the inlet mouth.

Because the tabs 75, 76 are all arcuate and a corresponding shape to the interior of the side wall 31 they act as a guide means so that the valve 25 slides substantially axially within the chamber and does not, for example, tilt during its movement.

With the valve 25 in the second position shown in FIG. 9 product can now enter the chamber 31 through the spout 34.

The second position of the valve 25 is defined by the engagement of the free ends of the tabs 75 a, b, c with the underside of the stop bead 73. In this position the spout 28 has moved through the orifice side wall 56.

As illustrated by arrow A, upon entering the chamber 30 fluid passes under the platform 26 (as it cannot pass around the edges) to the orifice 27 where after it travels across the upper side of the platform 26 to the spout inlet 29, then through the spout 28 for final discharge through the orifice 55.

When dispensing is complete the lid 15 can be returned to the closed position of FIG. 8 which causes the spigot 65 to enter the orifice 55 and once again push the valve 25 down and back to the position shown in FIG. 8 where the orifice 33 is blocked. 

1. A dispensing closure for a flowable product, the closure having: a dispensing orifice; a pre-dispensing chamber with an inlet; and a valve member translatable within said chamber between a first position and a second position, wherein in said first position said chamber inlet is blocked by said valve member and said valve member is movable away from said chamber inlet in response to product flow such that in the second position the inlet is unblocked and is in fluid communication with said dispensing orifice through said chamber. 2-3. (canceled)
 4. The closure as claimed in claim 1, in which said valve member moves generally axially within said chamber.
 5. The closure as claimed in claim 1, in which said chamber is generally bucket-like.
 6. The closure as claimed in claim 1, in which said valve member includes an inlet.
 7. The closure as claimed in claim 1, in which said valve member includes a spout.
 8. The closure as claimed in claim 7, in which said orifice has an orifice sidewall and said valve member spout extends into said dispensing orifice sidewall.
 9. The closure as claimed in claim 7, in which the spout includes in inlet.
 10. The closure as claimed in claim 7, in which said inlet is provided in the region of a base of said spout.
 11. The closure as claimed in 1, in which the closure includes a base and a lid.
 12. The closure as claimed in claim 11, in which said lid is moveable between an open position and a closed position.
 13. The closure as claimed in claim 11, in which when said lid is in the closed position said valve member is caused to be in the first position.
 14. The closure as claimed in claim 11, in which said lid and said base are joined by a hinge.
 15. The closure as claimed in claim 11, in which said lid includes a spigot.
 16. The closure as claimed in claim 14, in which said spigot is capable of pushing said valve member to the first position. 17-20. (canceled)
 21. A dispensing closure in combination with a container for a flowable product, the closure having: a dispensing orifice; a pre-dispensing chamber with an inlet; and a valve member translatable within said chamber between a first position and a second position, wherein in said first position said chamber inlet is blocked by said valve member so that product from the container cannot enter the chamber, and said valve member is movable away from said chamber inlet in response to product flow such that in the second position the inlet is unblocked and said container is in fluid communication with said dispensing orifice through said chamber.
 22. The closure as claimed in claim 1, in which the closure comprises a tamper evident member.
 23. The closure as claimed in claim 1, in which the valve member includes a disc-like main platform.
 24. The closure as claimed in claim 1, in which said valve member includes a plurality of tabs which conform to the shape of the interior of said chamber so that they act as a guide when the valve member moves within the chamber.
 25. The closure as claimed in claim 1, in which said valve member includes an inlet and an outlet, and in which when said valve is in the second position product enters the chamber through the chamber inlet and travels to the valve member inlet and then travels to the valve member outlet for final discharge through the dispensing orifice.
 26. A dispensing closure for a flowable product, the closure having: a dispensing orifice; a pre-dispensing chamber with an inlet; and a valve member movable between a first position in which the chamber inlet is blocked and product cannot flow into the chamber and a second position in which inlet is unblocked and is in fluid communication with the orifice, in which the valve member is translatable within the chamber between the first and second position, and in which the valve member is movable away from the chamber inlet in response to product flow so that product can flow from the chamber inlet through the chamber to reach the dispensing orifice when the valve is in the second position in the second position. 